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A Multiobjective Model for Locating Drop-off Boxes for Collecting Used Products

  • Tanaka, Ken-Ichi (Department of Informatics, Graduate School of Informatics and Engineering, The University of Electro-Communications) ;
  • Kobayashi, Hirokazu (NTT COMWARE Corporation) ;
  • Yura, Kenji (Department of Informatics, Graduate School of Informatics and Engineering, The University of Electro-Communications)
  • Received : 2013.01.31
  • Accepted : 2013.11.14
  • Published : 2013.12.31

Abstract

This paper proposes a multiobjective model describing the trade-offs involved in selecting the locations of drop-off boxes for collecting used products and transporting these products to designated locations. We assume the following reverse flow of used products. Owners of used products (cellular phones, digital cameras, ink cartridges, etc.) take them to the nearest drop-off box when the distance is reasonably short. We also assume that owners living closer to drop-off boxes dispose of more used products than do owners living farther from drop-off boxes. Different types of used products are collected, with each type requiring its own drop-off box. A transportation destination for each product is specified. Three objectives are considered: maximizing the volume of used products collected at drop-off boxes; minimizing the cost of transporting collected products to designated locations; and minimizing the cost of allocating space for drop-off boxes. We formulate the above model as a multiobjective integer programming problem and generate the corresponding set of Pareto optimal solutions. We apply the model to an area using population data for Chofu City, Tokyo, Japan, and analyze the trade-offs between the objectives.

Keywords

References

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